Multiple drill



l(No Model.) I 4 Sheets-Sheet 1.

J. I. WARMAN.

MULTIPLE DRILL.

. No. 592.943. PatentedN0v..2,1897.

f v 'Mill/Hmm \-f gll/fllmllmm (No Model.) 4 Sheets-Sheet2.

` J,41. WARMAN.

MULTIPLE DRILL.

No. 592,943` Patented Nov. 2, 1897.'4

www v Iwf (No Model.)

f 4 Sheefs--Sheet 3. J. I. WARMAN.

MULTIPLE DRILL.

No. 592,943. Patented Nov. 2, 1897.

J. I. WARMAN. MULTIPLE DRILL No. 592,943. `Patented Nov. 2, 1897. L

UNITED STATES PATENT EEicE.

JOHN ICELY WARMAN, OF CHICAGO, ILLINOIS.

M ULTIPLE DRILL.

SPECIFICATION forming part of Letters Patent No. 592,943, dated November2, 1897.

Application led Tune 25, 1896. Serial No. 596,844. (No model.)

T0 all whom, it may concern.-

Beit known that I, JOHN ICELY WARMAN, of Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Multiple Drills; and I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to multiple drilling-` machines of that classwherein a plurality of drill-carryin g spindles positioned at the sameor at different angles are caused to move ra-j dially in an outwarddirection from a common center and simultaneously perform the op`eration of drilling.

The invention is illustrated in connection with a circular rim to bedrilled; but it will be manifest without additional drawings that theinvention may be applied for the purpose sired intervals from each otherand whetherl the drilled holes be equidistant from a com'- mon center ornot.

My invention, speaking in a general way, comprises a frame provided witha substantially horizontal table upon which the work is to be placed andmeans for securing the work thereon, the latter consisting of aplurality of chucks adapted to be simultaneously operated to moveinwardly and thus center and secure the work. The frame is adapted tocarry a pair of annular racks which respectively engage pinions upon theupper and lower sets of drill-carrying spindles, whereby the latter maybe suitably and uniformly rotated, motion being communicatedsimultaneously to the two racks from a single driving-shaft. The ends ofthe drill-carrying spindles are arranged to bear against acentrally-placed movable wedge or cone, which at times is caused to moveupwardly, and thus independently of the rotation of the drillcarryingspindles press the latter outwardly to their work. lThe feed cone orwedge is herein shown as being actuated from a footlever, there being ashort link and universaljoint connection between the end of the leverand the end of a sliding shaft which actuates said cone.

A machine embodying my invention further comprises the usual bearingsand connectin g parts, as well as means for adjusting to any desiredangle the several drill-carrying spindles.

The invention consists in the novel devices and combination of devicesherein disclosed, and it will be more readily understood by reference tothe accompanying drawings and subjoined description thereof and by theclaims appended hereto.

In said drawings, Figure l illustrates in plan view a machine embodyingmy invention. Fig. 2 illustrates 'a central vertical sectional view ofthe main operative parts of the machine, some of the parts being shownin elevation. Fig. 3 is an enlarged vertical sectional view of the mainoperative parts of the machine, the section being taken upon the line 33 of Fig. 2. Fig. 4 is also an enlarged view looking down upon the tableand upon the lower rack, the section being taken on line et -l of Fig.3. Fig. 5 is a vertical longitudinal sectional view showing theconstruc- -tion of one of the drill-carrying spindles and its adjustablebearing. Fig. is a side elevation of the adjustable bearing for theother drill-carrying spindles. Fig. 7 is a rear end view of the latter.Fig. 8 is a bottom plan view of the same. Fig. 9 is a'front end view ofthe sleeve on the drill-carrying spindle.

Fig. lO is a transverse sectional view of the second bracket A2 dependsfrom the table a, 9 5

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with a driving miter-wheel A4. Motion is communicated to the shaft A3 ina familiar manner from any suitable source of power.

It will be noticed that in the form of the invention illustrated hereinthe table a is circular in general contour and has two main levels orelevations a6 al, separated by the vertical shoulder a2, The lower andinner table a carries the adjustable brackets for holding thedrill-carrying spindles, while the outer or upper table a7 carries thechucks for holding the work. Beneath the section of the table aconstituting the portion lettered a7 and at suitable intervals aplurality of projecting plates A4 are secured by means of bolts a2 orotherwise, said plates extending radially outward beyond the outermargin of the section a7 of the table a.

A ring B is positioned around the outer section of the table a and restsupon and is supported by plates A4. A handle B or other suitablyprojecting part is secured tothe ring B in any convenient manner, as bybolts b or otherwise, whereby the ring B may be moved bodily upon theseveral supporting-plates A4 and around the table a.

B2 is one of a series of movable or sliding chucks provided on its inneror engaging face with a cutaway portion, as shown at b, of anyconvenient configuration adapted for the work to be held upon thetable-in this instance the concavo-convex rim C of an ordinarybicycle-wheel. The chuck is of such length as to extend beyond thesection (t7 of the table d and outward over the ring B. Upon the sectiona7 of the table and at such points where it is desired to have a chucklocated I provide a pair of guide-plates or strips b2, which may besecured to the table a7 by belts Z13 or in any suitable manner, andwhich afford a guide b4 wit-hin which the chuck B2 may move. The inneror guide faces of the guide-plates b2 will be positioned parallel with aradius of the circle upon which the ring B is described, so as to causethe chuck B2 to move in a radial line toward and from the center when itmoves at all.

The outer end of the chuck B2 is provided with a vertical aperturethrough which a bolt B3 is passed, the lower end of the said bolt beingprovided with an enlarged head Zf and the upper end being provided witha nut h6, the latter being suitably located in a recess in the upperface of the chuck B2. The enlarged head b5 of the several bolts B3 areeach positioned in an elongated slot B, extending vertically through thering B, one slot to each bolt. It will be noticed particularly byreference to Fig. l of the drawings that these elongated slots are notconcentric with the ring B, but are eceentrically arranged, whereby itwill be obvious that upon moving the ring in either direction around thetable a7 and upon the supporting-plates A4 the sides of the slots B4,engaging as they do the heads b5 of the bolts B3, have a cam movementand move the bolts B2 radially outward from or toward the center of themachine. Inasmueh as said bolts are passed through chucks B2 and thelatter are so confined in the guides b4 as to have movement only in aradial direction, the chucks are thus moved in the desired directionwith the bolts B2. Assuming the chucks, therefore, to be in the positionillustrated in Fig. l, clamping the work to be drilled, a movement ofthe handle B toward the top of the figure or in the direction indicatedby the arrow will simultaneously move all of the chucks outwardly andaway from the work and thus enable the latter to be removed from themachine and a fresh piece of work placed thereon. It will be manifest ofcourse that after the new work has been placed on the table a movementof the handle B in the direction opposite to that indicated by the arrowin Fig. l will cause the several chucks to simultaneously move inwardand thus center and clamp the work upon the table preparatory to theoperation of drilling.

I will next describe the drill-carrying spindles and the adjustablebrackets for holding the same, referring more particularly to Figs. 4 tol0, inclusive, of the drawings.

The section a of the table a is provided with a concentric T-shapedrecess or groove (designated as a whole by the letter D) comprising anenlarged lower portion d and a narrower portion d so arranged that thetop walls of the larger portion d will constitute shoulders (Z2. At aconvenientplaee an opening or aperture d3 is made which extends throughthe lower wall of the recess d to the lower surface of the portion a ofthe table, the opening being at least as large in diame ter as is thesaid portion (l in width, whereby a convenient means is afforded for theinsertion of a bolt D', having a head d". After the bolt has beeninserted through the aperture d3 until the shoulders on its head (Z4engage the shoulders d2 of the recess l it may then be movedlongitudinally into any desired position in the slot D. As manyot thebolts D' will be used as may be necessary for the purpose of securingthe drill-carrying-spindle brackets E to the table Uf.

The brackets E each consist of two parts, a base e and an upper orjournal portion e', the latter being provided, preferably, with a pairof upwardly-extending arms e2. The under surface of the base part c isflat, as shown in Fig. S, and is provided with a transversely-arrangedrib es of such width as to nicely tit within the upper portion d of theslot or recess D, and thus prevent a longitudinal movement of the part Cradially of or transversely with respect to the part a of the table a. Avertically-arranged aperture e" extends through the base part c and therib c2, said aperture e4 being of a size sufficient to permit the bolt Dto be passed therethrough. The upper surface of the base part e of thebracket E is concave or curved longitudinally, as clearly shown in Figs.5 and and IOC ITO

it is provided with a rib or tongue e5, extending lengthwise of the baseportion e, said rib or tongue being relatively wide, although notextending the full width of the base-plate e, as clearly seen in Fig.'7. The under surface of the journal or upper portion of the surface eis given a convex conguration corresponding with the upper surface ofthe base part e, whereby the two surfaces will perfectly register, acentral longitudinal groove being cut in said under surface portion e,thus forming two projecting iianges e6, adapted to embrace the tongue orrib e5, that enters the groove between said flanges. An elongated slotor aperture c7 extends through said upper portion e', as indicated, forthe reception of the upper portion of the bolt D', said bolt beingsecured in position by a lock-nut D2, which latter engages screw-threadsupon said bolt and is crowded against a washer d5 on the part e adjacentto the said slot. The slot e7 extends on either side of the bolt D' forsome considerable distance in a direction lengthwise of the bracket E.

It will be obvious that upon loosening the nut D2 the upper portion e'of the bracket E may be adjusted with respect to the lower portion e andthe nut D2 again tightened, whereby the inclination or direction of thedrill-carrying spindle may be suitably adj usted. In this connection itmay be stated that the bracket E shown in Fig. 6 is of the sameconstruction as that shown in Fig. 5, although the lower portion e isconsiderably smaller in size, it being more convenient to make theseparts of different sizes where one set of brackets carries the lowerdrill-spindles and the other carries the upper drill-spindles. All thebrackets may obviously be of the same size, if desired.

Each bracket-arm e2 is provided with any suitable journal-bearingarranged longitudinally of the bracket E,.for the purpose of supportinga drill-carrying spindle F. These spindles are provided at one end withany suitable style of drill-holding chuck f, in which the drills F' areremovably secured. The chuck f acts as a shoulder to engage the face e8of the journal-arm e2 and thus limit the longitudinal movement of thedrill-carrying spindles F in one direction. Obviously, any suitablecollar or stop upon the spindle may be used for the purpose, if desired.Near its other end the spindle 'F is provided with a groove or slot f',that extends lengthwise of the spindle. Surrounding `the spindle F is asuitable sleeve f2, havinga longitudinal opening therethrough, fequal indiameter to that of the drill-carrying spindle F, and provided with afeather or rib f4, projecting within said opening f2, adapted to fitwith-in the groove f' of the spindle, whereby a longitudinal movement ofthe carrying-spindle F may be secured without obtaining rotary movementof the sleeve f2. The sleeve f2 is provided at one end with an annulariiange f5, adapted to engage the face e9 of the inner bracket-arm e2,and it is provided at its other end with a reduced but exteriorlyscrew-threaded portion f6. The length of the sleeve f2 is such that whenits flange f5 engages the face e9 of the bracket-arm the threadedportion f6 extends beyond the other face @10 of the bracketarm. A beveldriving-pinion G is positioned partially upon the spindle F andpartially upon the sleeve f2, it being secured to the latter by means ofscrew-threads upon the interior surface of a suitable recess engagingthe screw-threads upon the portion f6 of the sleeve which exten ds intosaid recess,as shown in Fig. 5. One surface or edge g of thedriving-pinion G is thus brought into contact with the face el@ of thebracket-arm e2. From this arrangement it will be manifest that uponrotating the driving-pinion G and the sleeve f2 rotary motion will becommunicated to the drill-carrying spindle F by reason of the rib orfeather f4 of the sleeve engaging the recess f' of said spindle. It willalso be obvious that the drill-carrying spindle F may be moved towardits work and withdrawn therefrom-that is to say, that it may be given alongitudinal movement quite independent of its rotary motion.

I will now proceed to describe the mechanism for imparting rotary motionto the drillcarrying spindles.

The two arms of the bracket d' unite at their lower ends and support avertically-arranged journal-bearing h, which supports a movable feed-barI-I. Surrounding the feed-bar H is a tubular or recessed shaft H', whichrests at its lower end upon the upper end of said j ournal-bearing h andat its upper end is provided with a circular driving-rack I, securedthereto by means of arms i'. The lower face of the driving-rack I isprovided with teeth z", adapted to engage one of the sets ofdriving-pinions G. Rotary motion is communicated to the shaft H from thedriving-shaft A3 by means of a bevel gear-wheel h', suitably secured, asby a key h2 or otherwise, to the lower end of the shaft I-I', the teethof which bevel h' enga-ge theteeth of the driving miter-wheel A4. Abearing is afforded for the shaft H' by a suitable aperture through thelower portion of the curved bracket-arms h3, which latter terminate attheir upper ends in laterally-extending flanges h4, by which thebracket-arms h2 are secured to the under surface of the plate a6 of thetable by bolts h5, passing through apertures in the iianges h4 and intoscrew-threaded recesses in the table, or otherwise. The arms h2, Fig. 8,are positioned at right angles to the arms of the bracket a', Fig. l,whereby strength and rigidity to the structure as a whole are secu red.

A second drill-driving rack I', provided on its upper face with teeth712, that engage one of the sets of drill-driving pinions G, issupported by bracket-arms 2 from a short sleeve 4, which surrounds theshaft H'. 'Io the lower end of this sleeve 4 is secured a bevelgear-wheel h6, adapted to engage the driving IOO IIO

. pins or trunnions Z.

miter-wheel A4. It will'be perfectly obvious that when rotary motion iscommunicated to the drivin g-shaft As from any suitable source of powerthe drill-spindles F and the drills carried thereby, will be suitablyrotated through the medium of the gears A4 h h, the racks I I', and theseveral pinions G.

It will be understood that the clearance between the gears and rackswill be suflicient to provide for the adjustment above described.

I will next describe the means employed for feeding the drills to theirwork. The mechanism employed for this purpose consists of a cone J,arranged to slide vertically upon the shaft II. rlhe inner end of eachdrill-carrying spindle F rests against this cone J, as indicated inFigs. l and 2, whereby it will be manifest that when the cone J israised each of the spindles will be moved longitudinallyoutwardly-'z'.c., in a radial direction toward its work.

The mechanism for moving the cone J vertically to feed the spindlesforward to their work is as follows: rlhe shaft II is provided with acentral aperture o1 recess j and telescopes over the feed-bar Il, sothat the latter may be moved longitudinally therein. The upper end ofthe feed-bar II is provided with an outwardly extending arm or nger y",adapted to pass through an elongated slot K7'2, that extends through thewall of the shaft II to the recess y'. The under surface or edge of thehub i3 of the cone J rests upon or is engaged by this arm or finger j.The shaft II having no vertical movement, it follows that when thefeed-bar II is reciprocated therein in one direction-that is to say, ismoved upwardly-the finger j' will lift the cone J and the latter willfreely slide upon the shaft II, and it will be manifest that when thefeed-bar II is ret-urned or moved in the opposite direction said cone Jwill return by gravity to its lowermost or normal position, asillustrated in Fig. 3.

Any suitable means may be employed for actuating the feed-bar II, but Iprefer to use a foot-lever K, suitably pivoted at 7c and connected atits inner end with the feed-bar Il by a link K, the link having anysuitable universal-joint connection with the lower end of the saidfeed-shaft. Surrounding a reduced portion Z of the bar II is a rotatablecollar L, provided with outwardly-extending A bolt Z2 passes through theplate or washer Z3 and enters the lower end of the reduced portion Z ofthe bar II, and thus secures the collar L rotatably to the bar II. Theupper end of the link K is bifurcated, the two arms 7s being providedwith suitable apertures for the reception of the trunnions Z'. By thissimple arrangement a universaljoint connection is formed. The lower endof the link K is also bifureated, its two arms 7a2 straddling the innerend of the foot-lever K and being pivotally secured thereto bypivot-bolts 7a3.

A cap K2 may be secured to the top of the shaft II by screw-threads orotherwise, as shown, and thus confine the bracket-arms of the upperdriving-rack I in the proper position.

In operation, the cone J being in its lowermost position andthe chucksB2 being in their outermost position, the work C is placed upon thetable and the handle B moved around in the proper direction to cause allof the chucks to simultaneously move inwardly and thus position andcenter the work. Pressure is then brought upon the foot-lever K, thecone J is thus raised, and the drill-carrying spindles are movedoutwardly simultaneously to their work until the necessary drilling isaccomplished, the shaft A3 rotating in the meanwhile. Upon releasing thepressure on the foot-lever K the cone J drops by gravity and thedrill-carrying spindles F are moved inwardly by hand, so as to disengagethe drills from their work. The chucks B2 are then moved outwardly byturning the ring B in the desired direction, and the work C is thenremoved frein the table, when it will be found that the desired numberof apertures corresponding with the number of drills employed will havebeen made through the work and in the desired relation or angle to eachother. The machine is simple, easily managed, not liable to get out oforder, and requires little or no repairing. By its use work may beturned out with great rapidity, and particularly such work as the boredrings or tires of bicycle-wheels.

lVhile I have herein illustrated a desirable form of machine forembodying my invention, it will be manifest that many changes may bemade therein without departing from the essential principle thereof, allof which changes or modifications I desire to be included in the scopeof myinvention. Except, therefore, as they are made the subject ofspecific claims, I do not desire to be limited to the details ofmechanism herein shown.

I claim as my inventionl. A multiple drilling-machine comprising aframe, a plurality of movable chucks thereon, means for actuating thechucks to engage and center the work, a plurality of adjustabledrill-carrying spindles mounted on said frame, means for actuating saidspindles and means for moving the spindles toward the work comprising acam engaging the free ends of the same.

2, A multiple drilling-machine comprising a frame, a plurality ofmovable chucks mounted thereon, means for actuating the said chucks toengage and center the work, a plurality Ofdrill-carrying spindlesmounted in adjustable brackets secured on said frame whereby the angleof the drill-carrying spindles may be adjusted as desired, means foractuating said drill-spindles and means for moving the same outwardlytoward the work comprising a cam engaging the free ends thereof.

3. A multiple drilling-machine comprising IOO IIO

a horizontal table provided with movable work-holding chucks, means forsimultaneously actuating the chucks to engage and center the work, aplurality of adjustable drill-carryin g spindles mounted on said table,carrying drills on their outer ends, means for actuating thedrillcarrying spindles and means for simultaneously feeding the drillsto their work comprising a cam engaging the free ends of said spindles.

4. A multiple drilling-machine comprising a horizontal table providedwith movable work-holding chucks, means for simultaneously actuating thechucks to engage and center the Work, a plurality of adjustabledrill-spindles mounted on said table carrying drills on their outerends, meansfor actuating the drill-carrying spindles and means forfeeding the drills to their work comprising a vertically-movable camengaging the inner ends of the drill-carrying spindles.

5. A multiple drill comprising a substantially horizontal table providedwith movable chucks, means for simultaneously actuating the chucks toengage and center the Work, a plurality of drill-carrying spindles,brackets for said spindles adjust-ably secured to the table whereby thedrill-carrying spindles may be adjusted in a desired direction, meansfor simultaneously actuating the drill-carrying spindles, and means forsimultaneously feeding the drills outwardly to their work, comprising avertically-movable cone engaging the inner ends of the drill-carryingspindles, substantially as described.

6. A multiple drilling-machine having a table provided with a T slot orrecess in its face and a plurality of drill-carrying-spindle bracketsmounted on said table each consisting of a base and a spindle-supportprovided with a bolt-aperture therethrough and means for securing saidparts adjustably together and to the table comprising a bolt engagingsaid slot and passing through the bolt-aperture of said bracket.

7. In a multiple drill, the combination with a ltable, of a compounddrill-carrying-spindle bracket, the upper member of which is providedwith bearings for-the said spindles, an

elongated slot extending through said upper member, a bolt-apertureextending through the lower member, the adjacent faces of the twomembers being tongued and grooved and the one being convexed and theother concaved, and a bolt engaging the machine-table extending throughthe said bolt-aperture and through the 4said elongated slot, a lock-nuton the free end of said bolt, and a head upon the other end of said boltengaging the table, substantially as and for the purpose described.

8. In a multiple drill, the combination with the table of the machine,of a two-part drillcarrying bracket, a concentric or annular inverted-Tslot in the table, a headed bolt engaging the said slot and extendingthrough a suitable aperture in the bracket, a lock-nut on the free endof the said bolt, the under side of the lower part of the bracket beingprovided with a transversely-arranged rib adapted to engage the narrowportion of the inverted-T slot, substantially as described.

9. A multiple drilling-machine comprising a horizontal frame, two setsof radially-arranged drill-carrying spindles mounted thereon, eachprovided with a pinion, the spindles of each set rotating in dierentplanes, means for rotating each set of spindles, and means engaging theinner ends of said spindles for simultaneously feeding said drills totheir Work.

10. A multiple drilling-machine comprising a horizontal frame, two setsof radiallyarranged drillcarrying spindles mounted thereon, eachprovided with a pinion, the spindles of each set rotating in differentplanes, means for rotating each set of spindles, and a cam engaging theinner ends of said spindles for simultaneously feeding said drills totheir work.

1l. A multiple drilling-machine comprising a horizontal frame, two setsof drill-carrying spindles mounted thereon, each provided with a pinion,the pinions of the respective sets rotating in dierent planes, aseparate driving-wheel for each set of pinions, means for actuating saidwheels, and a cam engaging the inner ends of the spindles for feedingsaid drills to their work.

12. In a multiple drilling-machine comprising two sets of drill-carryingspindles each provided with a pinion, the pinions of the respective setsrotating in different planes, up-

,per and lower circular racks engaging said pinions, the upper rackbeing connected to a shaft, and the lower rack being connected to asleeve surrounding said shaft, means for imparting rotary motion both tosaid sleeve and said shaft, substantially as described.

13. In a multiple drill, the combination with a table provided withmeans for securing the work thereon, of drill-carrying brackets adjustably secured on said table arranged to present the drills to the workat different angles, two sets of drill-carrying spindles having theirrear ends in different planes, driving-pinions on each drill-carryingspindle, an upper and a lower circular rack adapted to engage thedriving-pinions on said sets of spindles, the upper rack being securedto a suitable shaft provided with a miter-wheel, the lower rack beingsecured to a suitable sleeve surrounding said shaft, and also providedwith a miter-wheel, a power-shaft, and a driving-wheel thereon, engagingsaid miterwheels, substantially as set forth.

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14. A multiple drilling-machine compris ing two sets of drill-carryingspindles each provided with a pinion, the pinions of the respective setsrotating in different planes, upper and lower circular racks engagingsaid pinions, the upper rack being connected to a shaft, and the lowerrack being connected to a sleeve surrounding said shaft, means forimparting rotary motion both to said sleeve and said shaft, and meansforsimultaneously feeding the drills comprising a eene longitudinallymovable upon said shaft and having its outer surface in slidingengagement with the inner or free ends of the drill-Carrying spindles, acentral aperture in said shaft, an elongated slot extending through saidshaft and eommunieatin g with said aperture, a pin or finger seeured tosaid feed-bar passing through the slot in said shaft and engaging thelower side of said cone, and means for teleseoping the feed-bar withinthe shaft as desired, whereby the eone may be moved along said shaft andthe drills be fed to their work, substantially as described.

l5. An annular multiple drilling-machine comprising a horizontal frame,a plurality of work-holding chucks mounted thereon, means forsimultaneously aetuatin g said chucks to engage and center the work, twosets of radially-arranged, drill-Carrying spindles adjustably mounted onsaid frame each provided with a drivin g-pinion and eaeh set arranged toaet at a different angle, means for rotating said spindlessimultaneously and means for simultaneously moving said spindles towardthe work Comprising a cam engaging the inner ends thereof.

1G. An annular multiple drilling-machine Comprising a horizontal frame,a plurality of work-holdin g ehuelcs monn ted on said trame, means forsimultaneously aetuatin g said ehueks to engage and center the work, twosets of radially-arran ged drill-carrying spindles adjustably mounted onsaid frame eaeh provided with pinions, the pinions of eaeh set rotatingin dilerent planes, driving-gears engaging eaeh set of said pinions torotate the same, and means for moving said pinions outwardly toward thework comprising a movable Cam engaging the inner ends thereof.

In testimony that I Claim the foregoing as my invention I affix mysignature in presence of two witnesses.

JOHN ICELY TARMAN fitnessesz C. CLARENCE PooLE, TAYLOR E. BRowN.

